compiler-rt/test/tsan/ignore_lib6.cpp

   1 // RUN: rm -rf %t-dir
   2 // RUN: mkdir %t-dir
   3 // RUN: %clangxx_tsan -O1 %s -DLIB -fPIC -fno-sanitize=thread -shared -o %t-dir/libignore_lib.so
   4 // RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t-dir/executable
   5 // RUN: %env_tsan_opts=suppressions='%s.supp' %run %t-dir/executable 2>&1 | FileCheck %s
   6
   7 // Copied from ignore_lib5.cpp:
   8 // REQUIRES: stable-runtime
   9 // UNSUPPORTED: target=powerpc64le{{.*}}
  10 // UNSUPPORTED: target={{.*netbsd.*}}
  11
  12 // Test that pthread_detach works in libraries ignored by called_from_lib.
  13 // For more context see:
  14 // https://groups.google.com/forum/#!topic/thread-sanitizer/ecH2P0QUqPs
  15
  16 #include "test.h"
  17 #include <dlfcn.h>
  18 #include <errno.h>
  19 #include <libgen.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string>
  23 #include <sys/mman.h>
  24
  25 #ifndef LIB
  26
  27 void *thr(void *arg) {
  28   *(volatile long long *)arg = 1;
  29   return 0;
  30 }
  31
  32 int main(int argc, char **argv) {
  33   std::string lib = std::string(dirname(argv[0])) + "/libignore_lib.so";
  34   void *h = dlopen(lib.c_str(), RTLD_GLOBAL | RTLD_NOW);
  35   if (h == 0)
  36     exit(printf("failed to load the library (%d)\n", errno));
  37   void (*libfunc)() = (void (*)())dlsym(h, "libfunc");
  38   if (libfunc == 0)
  39     exit(printf("failed to find the func (%d)\n", errno));
  40   libfunc();
  41
  42   const int kThreads = 10;
  43   pthread_t t[kThreads];
  44   volatile long long data[kThreads];
  45   for (int i = 0; i < kThreads; i++)
  46     pthread_create(&t[i], 0, thr, (void *)&data[i]);
  47   for (int i = 0; i < kThreads; i++) {
  48     pthread_join(t[i], 0);
  49     data[i] = 2;
  50   }
  51   fprintf(stderr, "DONE\n");
  52 }
  53
  54 // CHECK-NOT: WARNING: ThreadSanitizer:
  55 // CHECK: DONE
  56 // CHECK-NOT: WARNING: ThreadSanitizer:
  57
  58 #else // #ifdef LIB
  59
  60 void *thr(void *p) {
  61   sleep(1);
  62   pthread_detach(pthread_self());
  63   return 0;
  64 }
  65
  66 extern "C" void libfunc() {
  67   const int kThreads = 10;
  68   pthread_t t[kThreads];
  69   for (int i = 0; i < kThreads; i++)
  70     pthread_create(&t[i], 0, thr, 0);
  71   sleep(2);
  72 }
  73
  74 #endif // #ifdef LIB